Selective signaling system.



. EjR. GILL. SELECTIVE SIGNALING SYSTEM.

APPLICATION FILED DEC. 8, 19 09.

Patented; Apr. 23,1912.

2 SHEETS-SHEET 1.

44 a ,lllljlll AUTOMATIC SE PE WITNESSES:

E. R.- GILL. SELECTIVE SIGNALING SYSTEM. APPLICATION FILED DEC. 8', 1909.

Patehted Apr 3, 1912.

2 SHBETSHEET 2.

AUTOMATIC SEND! T I F 2 KEY.

WITNESSES.

Y I HHS ,nal 7 of a coi tile i iE lh ll EDWIN R. GILL, 0F YONKERS, NEW YORK ASS-IGNOR, IB Y MES IIE ASSIGNMENTS, TO

HOWARD E. MERRELL, OF NEW YORK, N. Y., AND

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ORLO 3. Hammer, or smnrnronr,

SELECTIVE SIGNALING SYSTEM.

Patented Apr. 23, 1912.

Application nae December 3, 1909. Serial H0. 532,051.

To all whom it may concern:

Be it known that I, EDWIN R. GILL, a citizen of the United States, residing in the city of Yonkers, county of Westchester, and State of New York, have invented a certain new and useful Improvement in Selective Signaling Systems, of which the following is a specification.

This invention relates to signaling systerns, and more particularly to such systems as are applicable to telephonic railroad train despatching.

One of the objects of the present invention is to provide a convenient method of communicating the correct, time simulta necusly to the various despatehers along a telephonic despatching circuit.'

Another object is to provide means whereby signals arranged in a telephonic despatching circuit may be operated in consonance with electrical impulses impressed upon a telegraph circuit fromtthe National Observatory thereby enabling the time piece of each despatcher to he perlodically standardized.

Other objects will be in partobvious, and in part specifically adverted to hereinafter.

In the accompanying drawings wherein are illustrated two forms or embodiments of my invention: Figure 1 is a diagrammatic view of a preferred embodiment thereof; Fig. 2 is a similar View of a slightly dni'erent embodiment.

Similar reference characters refer to similar parts in both figures of the drawings.

Referring now to the drawings and particularly toFig- 1 the View may be said to illustrate diagrammatically the signaling devices, Wiring and operating devices in the principal despatchers office of a telephonic train despatching circuit.

1 and 2 respectively denote opposite sides of the main telephone line A, and connected in bridge therecf, as by wires 3 and 4: is a telephone indicated at Leading from wire 1 of the main line A is a wire 6 sets with one termi- )i'ltid upon oneleg of E which is shown at 10 a magnet, the yoke and leading from the other terminal 11 ct inthe telephone receiver said coil is a wire 12. This wire leads to a terminal 13 of a selector illustrated diagrammatically at 14. This selector which is preferably an instrumentsuch as is described in Letters Patent No. 906,523 issued tome December 15th, 1908, includes a magnet 15 and a coil 16 on said magnet, the latter being connected with the terminal .17.

Magnet15 is adapted to operate mechanism (not. shown) which causes a contact member 18 to engage an opposed contact member 20 and close a local circuit 21. Included in local circuit 21, in the present instance, is a battery 22 and a signal which may take the form of an ordinary Leading from terminal 1 of the selector is a wire 2% which leads to the. terminal 25 of l electric bell 23.

a, coil 26 positioned upon the other leg of magnet 10. A wire 27 leads from terminal 28 of the coil to the other side 2 of the line A. It will thus be scent-hat the coils 8 and 26 of the magnet 10 as well as the selector 14 are connected in bridge ofthe tele:

phone line A. If desired, a portion of the local circuit 21 may include a coil 29 positioned upon magnet 15;so that when the local circuit is closed by the selector 14 an induced current will beset up in the main line, the effect or which will be a buzzing 5. This buzzing will inform the operator that the local signal operating circuit has been closed.

3O denotes a polarized armature which e0 operates with the poles 31, 2 of the ma net 10. Armature 30 is provided witha clapcoact -w it h bells the armature 38, coils 37 of this relay arc includedin a local circuit 40 which isv pro vided with a battery 41. Included in this local circuit is a sender key 42 having the operating keys43. These keys, when open ated, actuate mechanism (not shown) to impress impulses of a predetermined character upon the local circuit 40 thereby operating the relay 36, Current supplying means shown herein is a wire 46 which connects with a terminalas a battery 1s provided at 44.: from which; 109 leads a wire 4:5, and leading from wire an crates the armature 38 of the relay.

2 shown operate to close between wires 55 and 56 as shown.

47 of the relay. A wire 48 leads from terminal 47 to a contact 50 with which cotipi I wire 51 leads from armature 38 to a switch terminal 52 and from the other terminal 53 leads a wire 54 which connects with wire 1 of the telephone line. Impedance as at 55 is included in wire 54.

Leading from wire 2 of the telephone line A is a wire 56 which includes impedance 57, a condenser as at 58 being interposed Wire 56 connects with a switch terminal 60 and from the other switch terminal 61 a wire 62, leads to a wire 63 which latter wire leads to the opposite side of the battery 44.

It will be seen that the circuit just described constitutes a local circuit which is connected to the opposite sides of the telephone line and that when the relay 36 is,

operated, as above described, battery 44 will impress such currents upon this circuit as will operate the selective mechanism 14 to sound the si nal 23.

64 and 65 lndicate switch arms, connected as by the cross bar 66 and move in unison. Switch arms 64 and 65 when in the positions the circuit just described. Y

B indicates a telegraph line comprising the opposite sides 67 and 67 which include a coil 68 of a relay 69 provided with an armature 70 adapted to be swung between opposed contacts 71, 72. A retractile spring 73 normally holds the armature in the position shown. Wire which leads from the battery 44 connects with contact 72 and battery 44. Bridging wires 45 and 76 are wires 77, 78 and 80 and interposed between wire 77 and wires 78 and 80 are condensers 81 and 82. A wire 83 extends from wire 77 tothe switch terminal 84. It will be noted that the switch arms 64, 65 may be swung out of engagement with terminals 52 and 61 and into engagement with the terminals 75, 84 to close the circuit just above de-' scribed with the telephone line. Having described this embodiment of iny invention the operation thereof may now be understood.

With the switch arms 64 and 65 in the position shown, the circuit is set for selective signaling, so that upon each operation of one of the sender keys, the relay 36 will be operated, whereupon a current from battery 44 will be impressed upon the following circuit to actuate the selector 14; through wires 45, 46'and 48 to the armature 38, "thence through wlre 51, switch arm 65, wire 54 and impedance coil to the side 1 of the telephone line, then through wire 6, coil 8,

wire 12, selector coil 16, wire 24, coil 26, wire 27 to the opposite side 2 of the telephone line, thence through wire 56, impedance coil 57, switch arm 64 and wires 62 and 63 to the opposite side of the battery 44. Upon the impression of impulses of a predetermined number and character upon this circuit the local circuit 21 will be closed by the engagement of contacts 18 and 20 whereupon-the signal 23 will be operated.

When it is desired .to standardize the various time pieces along the train despatching circuit, the operator in'each station along the line throws the switch arms 64 and 65 from the position shown in full lines of the drawings to that shown' in dotted lines,

whereby the train despatching circuit is opened and the various circuits placed in condition to be operated by the relay 69, in accordance with the impulses impressed upon the telegraph line B from the National Observatory. Such impulses are customarily impressed upon the telegraph line from the National Observatory at a predetermined time each day and the various circuits along the line are accordingly placed in condition to be actuated thereby a few minutes before this predetermined time. Assuming the various circuits to be in this condition and the relay 69 inoperation with armature 70 of the relay 69 in the position shown, it will be assumed that condenser 81 has just discharged and the current imthen through wire 6, coil 8, wire 12, coil 16,

wire 24, coil 26, wire 27 to theside 2 of the I telephone line, then through wire 56, switch arm64-a-nd wire 83to wire 77 which is extended between condensers'82-and 81. The battery 44 it will be observed is an exerting potential upon the condenser 82 to charge cuit', from the-positives'ide of the battery through wire 45, switch arm 70, wire. 74, switch arm 65, wire 54 to the side 1 of the telephone line A, thence through the wire 6. through various coils and back to-the side 2 of the telephone line, thence through wire 56, switch arm 64 and wire 83 to the wire 77.

When the armature 70 swings into'engagemnt with the contact'7l the condenser 82 discharges to impress the current uponthis circuit; wires 77 and 83, switch arm 64, wire 56 of the side 2 of the main telephone line' A thence through wire 27, coil 26, wire 24,

coil 16, wire 12, coil S'and wire 6 to the' that-condenser througl1 the following cir- 4 opposite side 1 of the main telephone line, thence through wire 54, switch arm 65, Wire 74:, armature 70, wire 76 to the negative side. Simultaneously .with the discharge of the condenser 82, the battery 4% exerts potential upon the condenser 81 through the wires 45 and 78 to charge that condenser.

It will be observed from the circuits'above outlined that during the operation of the relay 69, the condensers 81 and 82 are alternately charged and discharged and that each condenser when discharged impressesa current in an opposite direction from that in which it is impressed by the other through the coils 8 and 26, thereby changing the polarity of said coils and causing the olarized armature to be oscillated, as wil be understood. The signals 34 and 35 are accordingly operated in consonance with the impulses impressed upon the telegraph line B,

' thereby permitting the train despatchers along the line to standardize their time pieces from the National Oloservatory. When this operation has been effected and the switch arms 64 and 65 swung to the position shown the train despatching circuit is ready for operation.

In the embodiment of my invention illustrated in Fig. 2 the impedance coils and 57 located in wires 54 and 56 are omitted, as is also the condenser 58 interposed between said wires. In this embodiment, however, an impedance coil 85 is located in the wire 86 which extends from the wire 62 to the wire 63. An impedance coil 87 is also interposed between the wire 51 and the switch terminal 52. A condenser is shown at 88. Leading from one side of the coning sense.

denser 88 to wire 51 is a Wire 90, the point of joirrture of Wires 62 and 86 with the other side of the condenser 88 being connected by the wire 91. The operation of this embodiment of my invention will be understood from the description of the embodiment of the invention illustrated in Fig. 1 which has heretofore been given. It will accordingly be understood that I have provided an improved signaling system adapted to attain among others all the ends and objects above pointed out in an exceedingly simple yet eflicient manne-fii As many changes could be made in the above construction and many apparently widely differentembodiments of this invention could be made without departing from the scope thereof, it'is intended that all matter contained in the above description or shown in' the accompanying drawing shall be interpreted as illustrative and not in a limitthe language used in the following claims is intended .to cover all of the generic" and specific features of the invention herein described and all statements of the scope of It is also to be understood that the invention, which as a matter of language, might be said to fall therebetween.

Having thus described my invention what I claim as new, and desire-to secure by Letters Patent, is I 1. In a signaling system, in combination, a telephone line, a polarized signaling device connected in bridge of said line, a local circuit connected across said telephone line, a pair of condensers in said local circuit, said condensers being adapted to be alternately charged and discharged, current supplying means for charging said condensers, a, telegraph line, and a relay interposed between said local circuit and said telegraph line and adapted to be operated by electrical impulses impressed upon the latter.

2. In a signaling system, in combination, a telephone line, a polarized signaling device connected in bridge of said line, a local circuit connected to the oppositesides of said line, a pair of condensers so connected in said local circuit that each when discharged impresses a current in said local circuit in a direction oppositeto that in which it is impressed by the discharge of the other condenser, current supplying means in said local circuit adapted alternately to charge said condensers, a telegraph line, and a relay interposed between said telegraph line and said local circuit and adapted to be operated by electrical impulses impressed upon the former. v i

3. In a signaling system,in combination, a telephone line, a polarized signaling device connected in bridge of said line, a local circuit connected to the opposite sides of said telephone line, current supplying means connected in said local circuit, a pair of condensers connected in said local circuit,'said current supplying means exerting a constant potential on one or the other of said condensers, a telegraph line, and a relay operated by electrical impulses impressed upon the telegraph linefor opening and closing said local circuit to cause said condensers to alternately discharge whereby the electrical impulses impressed onthe local circuit will operate said polarized relay in consonance with the impulses impressed upon the telegraph line.

4:. In a signaling system, in combination, a main telephone line, a polai'ized ringer in bridge of said him, a local circuit connected to opposite sides of said telephone line, a pair of condensers connected in said local circuit so that when said condensersare alternately discharged current will be alterna-tel Y impressed in opposite directions in said ocal circuit, a battery connected in said local circuit so as to alternately exert potential upon said condensers, a telegraph line, and a relay actuated b impulses impressed on the telegraph line or opening and closing said local circuit whereby said con- In testimony whereof I aflix my signatur densers are albernatel charged and disin the presence of two witnesses.

charged and electricai impulses are im- ED-VIN (1LT pressed upon said local circult in consonance T with those impressed upon the telegraph Witnesses: line, thereby operating sai'd polarized sig- -FRANK J. KENT,

naling device. I B. W. COULDOOK.

Copies of this patent mey be obtained for five cents each, by addressing the Commissioner of Patents,

7 Washington, I). C. 

